KR20200043665A - Vehicle, controlling method thereof and electric power management system - Google Patents

Abstract

The present invention relates to a vehicle capable of operating in a plurality of power saving modes according to a state of charge of a battery. The vehicle comprises: a plurality of electric loads; a first battery; a first battery sensor which detects the state of charge of the first battery; and a controller calculating the cruising distance of the vehicle based on the state of charge of the first battery sensed by the first battery sensor, performing power saving control of the plurality of electric loads based on the comparison between the cruising distance of the vehicle and the distance to the destination, and setting the output reduction of each of the plurality of electric loads based on a record of use of the plurality of electric loads during power saving control.

Description

Vehicle, its control method and vehicle power management system {VEHICLE, CONTROLLING METHOD THEREOF AND ELECTRIC POWER MANAGEMENT SYSTEM}

The invention relates to a vehicle and a control method thereof, and more particularly, to a vehicle capable of increasing a cruising distance of a vehicle, a control method thereof, and a power management system.

2. Description of the Related Art In general, a vehicle means a transportation means or a transportation means driving a road or a track using fossil fuel, electricity, and the like as a power source.

The vehicle may include an internal combustion engine or motor for movement or transportation. For example, a general vehicle has an internal combustion engine, and the internal combustion engine can convert the chemical energy of fossil fuel into kinetic energy that moves the vehicle. The electric vehicle is provided with a drive motor, and can convert the electric energy into kinetic energy for moving the vehicle. The hybrid vehicle may include both an internal combustion engine and a drive motor.

Vehicles (both general vehicles, electric vehicles, and hybrid vehicles) may include a generator that produces electric power supplied to electronic components and a battery that stores electric power produced by the generator.

It is very important to keep the battery charge in the vehicle constant for stable operation of the electric components in the vehicle. If the state of charge of the battery is not kept constant, the vehicle may not start or electric components may fail.

In particular, in electric vehicles and hybrid vehicles, it is important to maintain the battery's state of charge at a certain level or more since the state of charge of the battery is related to the cruising distance at which the vehicle can travel.

For the above reasons, one aspect of the disclosed invention is to provide a vehicle capable of operating in a plurality of power saving modes according to a state of charge of a battery, a control method thereof, and a power management system.

One aspect of the disclosed invention is to provide a vehicle, a control method, and a power management system capable of varying the output of the electric load in each of a plurality of power saving modes according to a driver's propensity to use the electric load.

A vehicle according to one aspect of the disclosed invention includes a plurality of electrical loads; A first battery; A first battery sensor detecting a state of charge of the first battery; And calculating the cruising distance of the vehicle based on the charging state of the first battery sensed by the first battery sensor, and comparing the plurality of electric loads based on a comparison between the cruising distance of the vehicle and a distance to a destination. And a controller configured to perform a power saving control and set the output reduction of each of the plurality of electric loads based on a record of use of the plurality of electric loads during the power saving control.

The higher the frequency of use of the electrical load, the controller can increase the output reduction of the electrical load.

The vehicle includes a second battery that outputs a lower voltage than the first battery; And a second battery sensor detecting a state of charge of the second battery, wherein the controller is based on a state of charge of the first battery, a state of charge of the second battery, and operation information of the plurality of electric loads. The cruising distance of the vehicle can be calculated.

When the distance to the destination is greater than the cruising distance, the controller may perform power saving control of the plurality of electrical loads.

The controller may reduce the output of each of the plurality of electrical loads according to the output reduction set based on the usage record of the plurality of electrical loads.

If the distance to the destination is greater than 1.2 times the cruising distance, the controller may stop the operation of the plurality of electrical loads.

A control method of a vehicle according to an aspect of the disclosed invention includes: a control method of a vehicle including a plurality of electric loads and a first battery, comprising: calculating a cruising distance of the vehicle based on a state of charge of the first battery; Perform power saving control of the plurality of electrical loads based on a comparison between the cruising distance of the vehicle and a distance to a destination; During the power saving control, it may include setting an output reduction of each of the plurality of electrical loads based on a record of use of the plurality of electrical loads.

Setting the output reduction of each of the plurality of electrical loads may include increasing the output reduction of the electrical loads as the frequency of use of the electrical loads increases.

Calculating the cruising distance of the vehicle includes: sensing a state of charge of a second battery that outputs a voltage lower than that of the first battery; And calculating the cruising distance of the vehicle based on the charging state of the first battery, the charging state of the second battery, and the operation information of the plurality of electric loads.

Performing power saving control of the plurality of electrical loads may include performing power saving control of the plurality of electrical loads when the distance to the destination is greater than the cruising distance.

Performing power saving control of the plurality of electrical loads may further include reducing the output of each of the plurality of electrical loads according to the output reduction set based on the usage record of the plurality of electrical loads.

Performing power saving control of the plurality of electrical loads may include stopping the operation of the plurality of electrical loads when the distance to the destination is greater than 1.2 times the cruising distance.

A power management system for managing power of a vehicle including a plurality of electric loads and a first battery and a second battery according to an aspect of the disclosed invention includes: a memory storing instructions; And calculating the cruising distance of the vehicle based on the charging state of the first battery and the second battery, and performing power saving control of the plurality of electric loads based on a comparison between the cruising distance of the vehicle and a distance to a destination. And, during the power saving control, it may include a processor for executing the instructions stored in the memory to set the output reduction of each of the plurality of electrical loads based on the record of use of the plurality of electrical loads.

The processor may execute instructions stored in the memory to increase the output reduction of the electrical load as the frequency of use of the electrical load increases.

The processor may execute instructions stored in the memory to calculate the cruising distance of the vehicle based on the charging state of the first battery, the charging state of the second battery, and the operation information of the plurality of electric loads.

The processor may execute instructions stored in the memory to perform power saving control of the plurality of electrical loads in response to a distance to the destination greater than the cruising distance.

The processor may execute instructions stored in the memory to decrease the output of each of the plurality of electrical loads according to the output reduction set based on the usage record of the plurality of electrical loads.

The processor may execute instructions stored in the memory to stop operation of the plurality of electrical loads in response to a distance to the destination greater than 1.2 times the cruising distance.

According to one aspect of the disclosed invention, a vehicle capable of operating in a plurality of power saving modes according to a state of charge of a battery, a control method thereof, and a power management system can be provided.

According to an aspect of the disclosed invention, it is possible to provide a vehicle, a control method and a power management system capable of varying the output of the electric loads in each of a plurality of power saving modes according to a driver's propensity to use the electric loads.

Furthermore, by varying the output of the electric load in each of the plurality of power saving modes according to the propensity to use the electric load of the driver, it is possible to increase the cruising distance of the electric vehicle.

1 shows a vehicle according to an embodiment.
2 shows a configuration of a power management system according to an embodiment.
3 shows a control configuration of a vehicle according to an embodiment.
4 illustrates a power saving operation of a vehicle according to an embodiment.
5 illustrates grouping of electrical loads included in a vehicle according to an embodiment.
6 shows a frequency of use of electric loads included in a vehicle according to an embodiment.
7 illustrates an output limit according to a frequency of use of electric loads included in a vehicle according to an embodiment.
8 illustrates an example of selecting a power saving step of a vehicle according to an embodiment.

The same reference numerals refer to the same components throughout the specification. This specification does not describe all elements of the embodiments, and the general contents in the art to which the disclosed invention belongs or overlapping contents between the embodiments are omitted. The term 'unit, module, member, block' used in the specification may be implemented by software or hardware, and according to embodiments, a plurality of 'unit, module, member, block' may be implemented as one component, It is also possible that one 'part, module, member, block' includes a plurality of components.

Throughout the specification, when a part is "connected" to another part, this includes not only a direct connection but also an indirect connection, and an indirect connection includes connecting through a wireless communication network. do.

Also, when a part “includes” a certain component, this means that other components may be further included rather than excluding other components, unless otherwise specified.

Throughout the specification, when one member is positioned "on" another member, this includes not only the case where one member is in contact with the other member but also another member between the two members.

Terms such as first and second are used to distinguish one component from other components, and the component is not limited by the above-mentioned terms.

Singular expressions include plural expressions, unless the context clearly has an exception.

In each step, the identification code is used for convenience of explanation, and the identification code does not describe the order of each step, and each step can be executed differently from the specified order unless a specific order is clearly stated in the context. have.

Hereinafter, working principles and embodiments of the disclosed invention will be described with reference to the accompanying drawings.

1 shows a vehicle according to an embodiment. 2 shows a configuration of a power management system according to an embodiment.

1 and 2, the vehicle 1 performs a conversion between kinetic energy and electric energy through a high voltage battery 110 that supplies power to the vehicle 1 while driving, and vehicle driving and regenerative braking. A driving motor 120, a high voltage convenience load 201 that provides convenience to the driver, a high voltage power controller 130 for controlling high voltage power, and a voltage converter 140 that performs voltage conversion between high voltage power and low voltage power ), A low-voltage battery 150 that stores electric power of the low-voltage power grid, a low-voltage safety load 202 related to driving and driver safety of the vehicle 1, and a low-voltage convenience load 203 that provides convenience to the driver. , Low voltage power controller 160 for low voltage power control.

The high voltage battery 110 may store high voltage power generated by regenerative braking of the drive motor 120. The high voltage battery 110 may supply high voltage power to the driving motor 120 when the vehicle 1 is driving. The high voltage battery 110 may supply high voltage power to the high voltage convenience load 201.

The high voltage battery 110 is, for example, an electric energy storage device capable of charging and discharging, and may include lead acid, AGM, lithium ion, super capacitor, and electric double-layer capacitor (EDLC).

A battery management system (BMS) 111 that manages a state of charge of the high voltage battery 110 may be provided. The battery management system 111 detects the output voltage of the high voltage battery 110, the input / output current of the high voltage battery 110, the temperature of the high voltage battery 110, and is based on the voltage / current / temperature of the high voltage battery 110 The state of charge (SoC) of the high voltage battery 110 may be calculated.

The driving motor 120 may receive high voltage power from the high voltage battery 110 and drive the vehicle 1 using the high voltage power of the high voltage battery 110.

The driving motor 120 may receive rotational force from the wheel of the vehicle 1 and generate electric power from the rotational force. The driving motor 120 may store the generated power in the high voltage battery 110.

The high voltage convenience load 201 may receive high voltage power from the high voltage battery 110 and provide convenience to the driver.

The high voltage bias load 201 may include, for example, a load using high voltage, such as a compressor 201a, a positive temperature coefficient (PTC) heater 201b, or the like.

The high voltage power controller 130 may manage high voltage power. The high voltage power controller 130 may receive a state of charge (SoC) of the high voltage battery 110 from the battery management system 111. The high voltage power controller 130 may determine the cruising distance of the vehicle 1 based on the state of charge (SoC) of the high voltage battery 110. The high voltage power controller 130 may control the output of the high voltage convenience load 201 depending on the cruising distance of the vehicle 1 or in response to the request of the low voltage power controller 160.

The voltage converter 140 may convert between high voltage power and low voltage power. For example, the voltage converter 140 may convert high voltage power output from the high voltage battery 110 to low voltage power and supply low voltage power to the low voltage battery 150. Also, the voltage converter 140 may convert low voltage power output from the low voltage battery 150 into high voltage power, and supply high voltage power to the high voltage battery 110.

The voltage converter 140 may include, for example, a DC-DC converter.

The low voltage battery 150 may store low voltage power converted by the voltage converter 140. The low voltage battery 150 may supply low voltage power to the low voltage safety load 202 and the low voltage convenience load 203.

The low voltage battery 150 is, for example, an electric energy storage device capable of charging and discharging, and may include lead acid, AGM, lithium ion, super capacitor, and electric double-layer capacitor (EDLC).

A battery sensor 151 may be provided to detect the state of charge of the low voltage battery 150. The battery sensor 151 detects the output voltage of the low voltage battery 150, the input / output current of the low voltage battery 150, the temperature of the low voltage battery 150, and the low voltage based on the voltage / current / temperature of the low voltage battery 150 The state of charge (SoC) of the battery 150 may be calculated.

The low voltage safety load 202 may receive low voltage power from the low voltage battery 150 and perform operations related to driving of the vehicle 1 and driver safety.

The low voltage safety load 202 may include a load directly connected to safety when the vehicle 1 is driven, such as a steering controller, a braking controller, a steering actuator, and a braking actuator.

The low voltage convenience load 203 may receive high voltage power from the low voltage battery 150 and provide convenience to the driver.

The low voltage convenience load 203 may include, for example, a convenience load using a low voltage such as the seat heating wire 203a, the rear heating wire 203b, and the blowing fan 203c.

The low voltage power controller 160 may manage low voltage power. The low voltage power controller 160 may control the output of the low voltage convenience load 203 depending on, for example, a state of charge of the low voltage battery 150.

The low voltage power controller 160 may receive information on the cruising distance of the vehicle 1 from the high voltage power controller 130 and determine whether to perform a power saving mode and a power saving step based on the cruising distance of the vehicle 1. have.

The low voltage power controller 160 collects the operation records of the high voltage convenience load 201 and the low voltage convenience load 203, and the electric load of the driver based on the operation records of the high voltage convenience load 201 and the low voltage convenience load 203. You can judge the propensity to use. In addition, the low voltage power controller 160 may limit the output of the high voltage bias load 201 and the low voltage bias load 203 in each of the power saving phases based on the driver's propensity to use the electrical load.

As described above, the entire electric load of the power grid of the vehicle 1 may be divided into a high voltage convenience load and a low voltage convenience load capable of power saving control to increase the cruising distance.

The power management system 100 may operate in four operation modes according to the cruising distance of the vehicle 1. For example, the power management system 100 may operate in the normal mode, the first power saving step, the second power saving step, and the third power saving step according to the cruising distance of the vehicle 1.

The power management system 100 may control the output of the high voltage bias load 201 and the low voltage bias load 203 in each of the four operating modes based on the driver's propensity to use the electrical load.

3 shows a control configuration of a vehicle according to an embodiment.

Referring to FIG. 3, the vehicle 1 includes a driver input unit 170, a low voltage battery 150, a battery sensor 151, a navigation 180, a high voltage battery 110, and a battery management system 111 ), A driving motor 120, a high voltage convenient load 201, a low voltage safety load 202, a low voltage convenient load 203 and a controller 190.

Low voltage battery 150, battery sensor 151, high voltage battery 110, battery management system 111, drive motor 120, high voltage convenience load 201, and low voltage safety load 202 With, the low voltage bias load 203 may be the same as described with reference to FIGS. 1 and 2.

The driver input unit 170 may receive a command related to a power saving operation of the vehicle 1 from the driver. For example, the vehicle 1 may operate in a normal mode, a first power saving step, two power saving steps, and three power saving steps.

The driver may select whether the vehicle 1 is powered off and a power saving level through the driver input unit 170. For example, the driver may select one of the normal mode, the first power saving step, the second power saving step, and the third power saving step through the driver input unit 170.

The driver input unit 170 may be directly or indirectly connected to the controller 190. For example, the driver input unit 170 may be connected to the controller 190 through the internal communication network of the vehicle 1, or may be directly connected through a hard-wire.

The driver input unit 170 may output an electrical signal corresponding to the driver's selection to the controller 190.

The driver input unit 170 may include, for example, a push switch and a membrane switch operated by a user pressing, or a touch switch operated by contact of a user's body part. You can.

The navigation 180 may determine a route to the destination in response to the destination input by the driver.

The navigation 180 may include a user interface for receiving information about a destination from a driver, and may include a global positioning system (GPS) receiver for determining the current location of the vehicle 1. The navigation 180 may determine a route from the current location of the vehicle 1 to the driver's destination.

The navigation 180 may be directly or indirectly connected to the controller 190. For example, the navigation 180 may be connected to the controller 190 through the internal communication network of the vehicle 1, or may be directly connected through a hard wire.

The navigation 180 may transmit information regarding the route from the current location of the vehicle 1 to the driver's destination to the controller 190. For example, the navigation 180 may transmit the determined distance of the route to the controller 190.

The controller 190 may include at least one of the high voltage power controller 130 and the low voltage power controller 160 described with reference to FIGS. 1 and 2. For example, the controller 190 represents the high voltage power controller 130, the controller 190 represents the low voltage power controller 160, or the controller 190 represents the high voltage power controller 130 and the low voltage power controller ( 160) All can be represented.

The controller 190 includes a processor 191 and a memory 192.

The processor 191 is a user input from the driver input unit 170, the charging state of the low voltage battery 150 from the battery sensor 151, the charging state of the high voltage battery 110 from the battery management system 111, and navigation ( The distance from 180) to the destination and operation information of each of the electrical loads 200 may be received from the plurality of electrical loads 201, 202, and 203: 200.

The processor 191 may set the output reduction of each of the electrical loads 200 in each of the power saving phases based on the operation information of the plurality of electrical loads 200.

The processor 191 receives operation information from the plurality of electric loads 200, and records the usage of each of the electric loads 200 and the electric loads 200 based on the operation information of the plurality of electric loads 200 ) Each power consumption can be collected. For example, the processor 191 may collect usage records and power consumption of the high voltage convenience load 201 and usage history and power consumption of the low voltage safety load 202 and usage history and power consumption of the low voltage convenience load 203. You can.

The processor 191 may determine the propensity to use the electric loads 200 of the driver. For example, the processor 191 may determine the frequency of use of each of the electrical loads 200 based on the usage record and power consumption of each of the electrical loads 200.

The processor 191 may set the output reduction of each of the electrical loads 200 in each of the power saving phases based on the frequency of use of each of the electrical loads 200. For example, the processor 191 may set the output reduction of the electrical loads 200 in each of the first power saving phase, the second power saving phase, and the third power saving phase.

Specifically, as the frequency of use of the electrical load increases, the processor 191 may increase the output reduction of the electrical load in the power saving mode.

The processor 191 may select whether the vehicle 1 is to be powered off and a power saving stage based on the driver input. For example, the processor 191 may select one of the normal mode, the first power saving step, the second power saving step, and the third power saving step.

In addition, the processor 191 may select whether the vehicle 1 is powered off and a power saving step based on the operation information of the plurality of electric loads 200. For example, the processor 191 may select one of the normal mode, the first power saving step, the second power saving step, and the third power saving step based on the operation information of the plurality of electric loads 200.

The processor 191 may determine the cruising distance of the vehicle 1 based on the state of charge of the high voltage battery 110 and the operation information of the plurality of electric loads 200. The processor 191 may calculate the amount of available power based on the state of charge of the high voltage battery 110 and the operation of the plurality of electrical loads 200. For example, the processor 191 may calculate the amount of charging power of the high voltage battery 110 based on the state of charge of the high voltage battery 110, and the electric loads based on the operation of the plurality of electric loads 200 The power consumption amount of 200 may be calculated, and the available power amount may be calculated based on the charging power amount and the power consumption amount. The processor 191 may calculate the cruising distance of the vehicle 1 based on the amount of power available and the average fuel ratio of the vehicle 1 (cruising distance per 1 kw).

The processor 191 may select whether the vehicle 1 is to be powered off and a power saving step based on the comparison of the distance of the route to the destination and the cruising distance. For example, the processor 191 may select the normal mode when the distance of the route to the destination is less than the cruising distance. The processor 191 may select the first power saving step in response to the distance of the route to the destination being greater than 1.05 times the cruising distance. The processor 191 may select the second power saving step in response to the distance of the route to the destination being greater than 1.10 times the cruising distance. The processor 191 may select three power saving steps in response to the distance of the route to the destination being greater than 1.20 times the cruising distance.

The processor 191 may reduce the output of the plurality of electrical loads 200 based on the output reduction of the electrical loads 200 set in each of the selected power saving step and the power saving step.

The memory 192 may store programs and data for controlling the operation of the vehicle 1.

In addition, the memory 192 is a user input from the driver input unit 170, the charging state of the low voltage battery 150 from the battery sensor 151, and the charging state of the high voltage battery 110 from the battery management system 111, The distance from the navigation 180 to the destination and the operation information of each of the electrical loads 200 from the plurality of electrical loads 200 may be temporarily stored.

The memory 192 is not only volatile memory such as S-RAM or D-RAM, but also flash memory, read only memory (ROM), and erasable programmable read only memory (EPROM). It may include a non-volatile memory.

4 illustrates a power saving operation of a vehicle according to an embodiment. 5 illustrates grouping of electrical loads included in a vehicle according to an embodiment. 6 shows a frequency of use of electric loads included in a vehicle according to an embodiment. 7 illustrates an output limit according to a frequency of use of electric loads included in a vehicle according to an embodiment. 8 illustrates an example of selecting a power saving step of a vehicle according to an embodiment.

4, 5, 6, 7 and 8, the vehicle 1 collects operation information 1010 of electric loads 200.

The processor 191 receives operation information from the plurality of electric loads 200 and collects usage records and power consumption of each of the electric loads 200 based on the operation information of the plurality of electric loads 200 You can.

The plurality of electrical loads 200 may be classified into a plurality of load groups 210: 211, 212, 213, 214, 215. For example, as shown in FIG. 5, the electrical loads 200 include a heating load group 211, a cooling load group 212, a display load group 213, and a chassis load group 214. , May be classified as an audio load group 215. The heating load group 211 may include a PTC heater, a seat heater, a steering wheel heater, a rear glass heating wire, and an outside mirror heating wire. The cooling load group 212 may include an air conditioner compressor, an air conditioning blower, a ventilation sheet, and the like. The display load group 213 may include a cluster, a head-up display (HUD), navigation, rear seat entertainment, and the like. Chassis load group 214 may include electronic control suspension, electronic AWD, roll stabilizer, rear wheel steering, active front steering, and the like. The audio load group 215 may include amplifiers, speakers, audio, active noise canceling, active sound design, and the like.

The processor 191 receives the operation information from the plurality of electrical loads 200, and based on the operation information of the plurality of electrical loads 200, the usage record and power consumption of each of the plurality of load groups 210. Can be collected. The processor 191 may obtain a usage record including on / off of the electrical loads 200 and an operation level of the electrical loads 200 based on the operation information from the electrical loads 200. Also, the processor 191 may calculate the power consumption of each of the electrical loads 200 based on the on / off of the electrical loads 200 and the operation level of the electrical loads 200.

The processor 191 may store usage records and power consumption of each of the plurality of load groups 210 in the memory 192.

The processor 191 may record environment variables outside the vehicle 1 along with operation information from the plurality of electric loads 200. For example, the processor 191 may record outside temperature, driving information (city road, highway), driving mode (normal mode, sports mode, eco mode), and the like.

The vehicle 1 determines a propensity to use the electric loads 200 of the driver (1020).

The processor 191 may determine the frequency of use of each of the plurality of electrical loads 200 based on the usage record and power consumption of each of the electrical loads 200.

For example, the processor 191 may determine the frequency of use of each of the plurality of load groups 210.

The processor 191 uses each of the electrical loads 200 based on a ratio of the actual power consumption of each of the electrical loads 200 during a predetermined time to a maximum power consumption of each of the electrical loads 200 for a predetermined time. The frequency can be calculated. For example, the processor 191 may calculate the frequency of use of each of the electrical loads 200 based on [Equation 1].

[Equation 1]

P_load = P_sum / P_max

However, P_load represents the frequency of use of each of the electrical loads 200, P_sum represents the actual power consumption of a predetermined time of each of the electrical loads 200, P_max is a predetermined time maximum of each of the electrical loads 200 Power consumption.

The processor 191 may calculate the frequency of use of each of the plurality of load groups 210 based on the frequency of use of each of the plurality of electrical loads 200. For example, the processor 191 may calculate the frequency of use of each of the load groups 210 based on [Equation 2].

[Equation 2]

P_group = ∑P_load / n

However, P_group indicates the frequency of use of each of the load groups 210, P_load indicates the frequency of use of each of the electrical loads 200, and n may indicate the number of electrical loads belonging to the load group.

For example, the processor 191 may calculate the frequency of use of the load groups 210 as shown in FIG. 6. The frequency of use of the heating load group 211 may be 0.2 to 0.4, the frequency of use of the cooling load group 212 may be 0.4 to 0.6, and the frequency of use of the display load group 215 may be 0.6 to 1, The frequency of use of the chassis load group 214 may be 0 to 0.2, and the frequency of use of the audio load group 215 may be 0 to 0.2.

The vehicle 1 sets the output reduction of the electric loads 200 in the power saving mode (1030)

The processor 191 may set the output reduction of each of the electrical loads 200 belonging to the load groups 210 in each of the power saving phases based on the frequency of use of each of the load groups 210. For example, the processor 191 may set the output reduction of the electrical loads 200 in each of the first power saving phase, the second power saving phase, and the third power saving phase.

Specifically, as the frequency of use of the load group is increased, the processor 191 can greatly reduce the output of the electrical load belonging to the load group in the power saving mode.

For example, as illustrated in FIG. 7, the memory 192 may store the output reduction of the electrical loads 200 in each of the first power saving phase, the second power saving phase, and the third power saving phase.

In the normal mode, the load groups 210 may output 100% of the output determined according to the driver's operation.

In the first step of power saving, the load groups 210 may output 70% of the output determined according to the driver's operation. In other words, the output of the load groups 210 is reduced by 30% in the first power saving stage.

In the second phase of power saving, the load groups 210 may output 30% of the output determined according to the driver's operation. In other words, the output of the load groups 210 is reduced by 70% in the first power saving stage.

In step 3 of power saving, the load groups 210 may output 0% of the output determined according to the driver's operation. In other words, the output of the load groups 210 is reduced by 100% in the first power saving stage.

As shown in FIG. 6, the frequency of use of the heating load group 211 may be 0.2 to 0.4, the frequency of use of the cooling load group 212 may be 0.4 to 0.6, and the frequency of use of the display load group 213 May be 0.6 to 1, the frequency of use of the chassis load group 214 may be 0 to 0.2, and the frequency of use of the audio load group 215 may be 0 to 0.2.

The output reduction of the heating load group 211 with a frequency of use of 0.2 to 0.4 may be the same as the default value. The output reduction of the heating load group 211 in the power saving stage 1 may still be 70%, and the output reduction of the heating load group 211 in the power saving stage 2 may still be 30%.

The reduction in output of the cooling load group 212 with a frequency of use of 0.6 in the second stage of power saving 0.4 may be 1.5 times the default value. In the first stage of power saving, the output reduction of the cooling load group 212 increases to 45%, and in the first stage of power saving, the cooling load group 212 may further reduce the output from 70% to 55%. In addition, the output reduction of the cooling load group 212 in the second power saving stage increases to 105%, and in the second stage of power saving, the cooling load group 212 may further decrease the output from 30% to 0%.

The output reduction of the display load group 213 with a use frequency of 0.6 to 1 may be twice the default value. In the first stage of power saving, the output reduction of the display load group 213 increases to 60%, and in the first stage of power saving, the cooling load group 212 may further reduce the output from 70% to 40%. In addition, the output reduction of the cooling load group 212 in the second power saving stage increases to 120%, and in the second stage of power saving, the cooling load group 212 may further decrease the output from 30% to 0%.

The output reduction of the chassis load group 214 and the audio load group 215 with frequency of use 0 to 2 may be 1/2 of the default value. The output reduction of the chassis load group 214 and the audio load group 215 in the power saving stage 1 is 15%, and in the power saving stage 1, the output of the chassis load group 214 and the audio load group 215 is 70%. It can be changed to 85%. In addition, the output reduction of the chassis load group 214 and the audio load group 215 in the second power saving stage is 35%, and the output of the chassis load group 214 and the audio load group 215 in the second power saving stage is 30. It can be changed from% to 65%.

The processor 191 may store the output reduction of the electrical loads 200 set for each power saving step in the memory 192.

The vehicle 1 determines whether to control power saving based on the operation information of the plurality of electric loads 200 (1040).

The processor 191 may select one of the normal mode, the first power saving step, the second power saving step, and the third power saving step based on the operation information of the plurality of electrical loads 200.

The processor 191 may determine the cruising distance of the vehicle 1 based on the state of charge of the high voltage battery 110 and the operation information of the plurality of electric loads 200. For example, the processor 191 may calculate the amount of charging power of the high voltage battery 110 based on the state of charge of the high voltage battery 110, and the electric loads based on the operation of the plurality of electric loads 200 The power consumption amount of 200 may be calculated, and the available power amount may be calculated based on the charging power amount and the power consumption amount. The processor 191 may calculate the cruising distance of the vehicle 1 based on the amount of power available and the average fuel ratio of the vehicle 1 (cruising distance per 1 kw).

The processor 191 may select whether the vehicle 1 is to be powered off and a power saving step based on the comparison of the distance of the route to the destination and the cruising distance. For example, as illustrated in FIG. 8, the processor 191 may select a normal mode when the distance of the route to the destination is smaller than the cruising distance. As illustrated in FIG. 8, the processor 191 may select the first power saving step in response to a distance of a path to a destination greater than 1.05 times the cruising distance. As shown in FIG. 8, the processor 191 may select two power saving stages in response to a distance of a path to a destination greater than 1.10 times the cruising distance. As shown in FIG. 8, the processor 191 may select three power saving steps in response to a distance of a path to a destination greater than 1.20 times the cruising distance.

The vehicle 1 controls the power savings of the electric loads 200 according to the power saving step (1050).

The processor 191 may reduce the output of the plurality of electrical loads 200 based on the selected power saving step and the output reduction of the electrical loads 200 set in each of the power saving steps as illustrated in FIG. 7.

As a result of the power saving control, when the distance of the route to the destination is greater than the cruising distance of the vehicle 1, the power consumption of the high voltage bias load 201 is reduced. In addition, the power consumption of the low voltage bias load 203 decreases, and the amount of power transferred from the high voltage battery 110 to the low voltage battery 150 by the voltage converter 140 decreases.

In particular, the output of the electric load with high frequency of use is greatly reduced by the electric load usage pattern of the driver, and the power consumption of the electric load with high frequency of use can be reduced. As a result, the power consumption of the entire electrical load can be dramatically reduced, and the cruising distance can be dramatically increased.

Meanwhile, the disclosed embodiments may be implemented in the form of a recording medium that stores instructions executable by a computer. Instructions may be stored in the form of program code, and when executed by a processor, may generate program modules to perform operations of the disclosed embodiments. The recording medium may be embodied as a computer-readable recording medium.

The computer-readable recording medium includes all kinds of recording media storing instructions that can be read by a computer. For example, there may be a read only memory (ROM), a random access memory (RAM), a magnetic tape, a magnetic disk, a flash memory, and an optical data storage device.

As described above, the disclosed embodiments have been described with reference to the accompanying drawings. Those skilled in the art to which the present invention pertains will understand that the present invention may be practiced in different forms from the disclosed embodiments without changing the technical spirit or essential features of the present invention. The disclosed embodiments are illustrative and should not be construed as limiting.

1: vehicle 100: power management system
110: high voltage battery 111: battery management system
120: drive motor 130: high-voltage power controller
140: voltage converter 150: low voltage battery
151: battery sensor 160: low voltage power controller
170: driver input 180: navigation
190: controller 191: processor
192: memory 200: electrical loads
201: High voltage convenience load 202: Low voltage safety load
203: low voltage convenience load 210: load groups
211: Heating load group 212: Cooling load group
213: display load group 214: chassis load group
215: audio load group

Claims (18)

In the vehicle,
A plurality of electrical loads;
A first battery;
A first battery sensor detecting a state of charge of the first battery; And
Calculate the cruising distance of the vehicle based on the state of charge of the first battery sensed by the first battery sensor, and save power of the plurality of electric loads based on a comparison between the cruising distance of the vehicle and a distance to a destination And a controller that performs control and sets an output reduction of each of the plurality of electrical loads based on a record of use of the plurality of electrical loads during the power saving control. According to claim 1,
The controller is a vehicle that increases the reduction in the output of the electric load as the frequency of use of the electric load increases. According to claim 1,
A second battery outputting a lower voltage than the first battery; And
Further comprising a second battery sensor for detecting the state of charge of the second battery,
The controller calculates a cruising distance of the vehicle based on a state of charge of the first battery, a state of charge of the second battery, and operation information of the plurality of electric loads. According to claim 1,
When the distance to the destination is greater than the cruising distance, the controller performs power saving control of the plurality of electric loads. According to claim 4,
The controller decreases the output of each of the plurality of electrical loads according to the output reduction set based on the usage record of the plurality of electrical loads. According to claim 1,
If the distance to the destination is greater than 1.2 times the cruising distance, the controller stops the operation of the plurality of electric loads. In the control method of a vehicle comprising a plurality of electrical loads and a first battery,
Calculating the cruising distance of the vehicle based on the state of charge of the first battery;
Perform power saving control of the plurality of electrical loads based on a comparison between the cruising distance of the vehicle and a distance to a destination;
And setting an output reduction of each of the plurality of electrical loads based on a record of use of the plurality of electrical loads during the power saving control. The method of claim 7, wherein setting the output reduction of each of the plurality of electrical loads,
A method of controlling a vehicle comprising increasing the output reduction of the electric load as the frequency of use of the electric load increases. The method of claim 7, wherein calculating the cruising distance of the vehicle,
Sensing a charging state of a second battery that outputs a voltage lower than that of the first battery;
And calculating a cruising distance of the vehicle based on a charging state of the first battery, a charging state of the second battery, and operation information of the plurality of electric loads. The method of claim 7, wherein performing the power saving control of the plurality of electrical loads,
And controlling the power saving of the plurality of electric loads when the distance to the destination is greater than the cruising distance. 11. The method of claim 10, Performing power saving control of the plurality of electrical loads,
And reducing the output of each of the plurality of electrical loads according to the output reduction set based on the use record of the plurality of electrical loads. The method of claim 7, wherein performing the power saving control of the plurality of electrical loads,
And stopping the operation of the plurality of electrical loads when the distance to the destination is greater than 1.2 times the cruising distance. A power management system for managing electric power of a vehicle including a plurality of electric loads and a first battery and a second battery,
A memory for storing instructions; And
Calculate the cruising distance of the vehicle based on the state of charge of the first battery and the second battery, and perform power saving control of the plurality of electric loads based on a comparison between the cruising distance of the vehicle and a distance to a destination. And a processor executing instructions stored in the memory to set an output reduction of each of the plurality of electrical loads based on a record of use of the plurality of electrical loads during the power saving control. The method of claim 13,
The processor is a power management system that executes instructions stored in the memory to increase the output reduction of the electric load as the frequency of use of the electric load increases. The method of claim 13,
And the processor executes instructions stored in the memory to calculate the cruising distance of the vehicle based on the charging state of the first battery, the charging state of the second battery, and the operation information of the plurality of electric loads. The method of claim 13,
And the processor executes instructions stored in the memory to perform power saving control of the plurality of electrical loads in response to the distance to the destination being greater than the cruising distance. The method of claim 16,
And the processor executes instructions stored in the memory to decrease the output of each of the plurality of electrical loads according to the output reduction set based on the usage record of the plurality of electrical loads. The method of claim 13,
And the processor executes instructions stored in the memory to stop operation of the plurality of electrical loads in response to the distance to the destination being greater than 1.2 times the cruising distance.

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